The Data Acquisition and Analysis System of Grating Geophone Based on FPGA
The data acquisition system before is usually based on single chip, whose working frequency is low so that the data sampled is easy missing. And the data analysis system normal is based on electronic subdivision circuit, which is complex and unsteady. To improve the measuring precision and resolution of grating geophone, a data acquisition and analysis system based on FPGA is designed. The data acquisition unit, asynchronous FIFO memory which is used for storing moiré fringe signal sampled, data analysis unit and so on contained in this system are designed based on hardware description language Verilog. And two software analysis principles are introduced in this system. Amplitude-periods combined principle is used for picking out the shift point accurately and then the software subdivision principle is used for getting the exact information at the shift point in data analysis unit. In this way, the size of circuit board is reduced effectively and high speed acquisition system and high precision grating geophone can be realized.
grating geophone FPGA data acquisition and analysis amplitude-periods combined and software subdivision principle
Li Shuqing Wang Guanya
College of Precision Instrument and OPTO-Electronics engineering, Tianjin University College of elec College of Electronic Information and Automation Tianjin University of Science and Technology Tianji
国际会议
2007 IEEE International Conference on Automation and Lofistics
山东济南
英文
2007-08-18（万方平台首次上网日期，不代表论文的发表时间）